diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 917bdc39a..8807b802d 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -15,14 +15,21 @@ jobs:
       uses: actions/setup-node@v1
       with:
         node-version: '12.x'
-    - run: npm ci
-    - run: git clone --branch master --depth 1 git://github.com/moodle/moodle $GITHUB_WORKSPACE/moodle
-    - run: git clone --branch ionic5 --depth 1 git://github.com/moodlehq/moodle-local_moodlemobileapp $GITHUB_WORKSPACE/moodle/local/moodlemobileapp
-    - run: git clone --branch MOBILE-3738 --depth 1 git://github.com/NoelDeMartin/moodle-docker $GITHUB_WORKSPACE/moodle-docker
-    - run: cp $GITHUB_WORKSPACE/moodle-docker/config.docker-template.php $GITHUB_WORKSPACE/moodle/config.php
-    - run: MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-compose pull
-    - run: MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-compose up -d
-    - run: MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-wait-for-db
-    - run: MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-wait-for-app
-    - run: MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-compose exec -T webserver sh -c "php admin/tool/behat/cli/init.php"
-    - run: MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-compose exec -T webserver sh -c "php admin/tool/behat/cli/run.php --tags="@app" --auto-rerun"
+    - name: Install npm packages
+      run: npm ci
+    - name: Additional checkouts
+      run: |
+        git clone --branch master --depth 1 git://github.com/moodle/moodle $GITHUB_WORKSPACE/moodle
+        git clone --branch ionic5 --depth 1 git://github.com/moodlehq/moodle-local_moodlemobileapp $GITHUB_WORKSPACE/moodle/local/moodlemobileapp
+        git clone --branch MOBILE-3738 --depth 1 git://github.com/NoelDeMartin/moodle-docker $GITHUB_WORKSPACE/moodle-docker
+    - name: Setup docker machine
+      run: |
+        cp $GITHUB_WORKSPACE/moodle-docker/config.docker-template.php $GITHUB_WORKSPACE/moodle/config.php
+        MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-compose pull
+        MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-compose up -d
+        MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-wait-for-db
+        MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-wait-for-app
+    - name: Init behat
+      run: MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-compose exec -T webserver sh -c "php admin/tool/behat/cli/init.php"
+    - name: Run tests
+      run: MOODLE_DOCKER_WWWROOT=$GITHUB_WORKSPACE/moodle MOODLE_DOCKER_APP_PATH=$GITHUB_WORKSPACE $GITHUB_WORKSPACE/moodle-docker/bin/moodle-docker-compose exec -T webserver sh -c "php admin/tool/behat/cli/run.php --tags="@app" --auto-rerun"
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index bb24d1c75..7c8d1e4fe 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -13,8 +13,45 @@ jobs:
       uses: actions/setup-node@v1
       with:
         node-version: '12.x'
-    - run: npm ci
-    - run: npm run lint
-    - run: npm run test:ci
-    - run: npm run build:prod
-    - run: result=$(npx check-es-compat www/*.js 2> /dev/null | grep -v -E "Array\.prototype\.includes|Promise\.prototype\.finally|String\.prototype\.(matchAll|trimRight)|globalThis" | grep -Po "(?<=error).*?(?=\s+ecmascript)" | wc -l); test $result -eq 0
+    - name: Install npm packages
+      run: npm ci
+    - name: Check langindex
+      run: |
+        result=$(cat scripts/langindex.json | grep \"TBD\" | wc -l); test $result -eq 0
+        if [ $result -ne 0 ]; then
+          echo "There are lang strings to be decided on langindex.json"
+          exit 1
+        fi
+        gulp
+        langlength=`jq -r '. | length' src/assets/lang/en.json`
+        langindexlength=`jq -r '. | length' scripts/langindex.json`
+        if [ $langlength -ne $langindexlength ]; then
+          echo "Lang file has $langlength while langindex $langindexlength"
+          exit 1
+        fi
+
+        langkeys=`jq -r 'keys[]' src/assets/lang/en.json`
+        langindex=`jq -r 'keys[]' scripts/langindex.json`
+        found=0
+        for i in $langkeys; do
+            skip=
+            for j in $langindex; do
+                if [ "$i" == "$j" ]; then
+                  skip=1
+                  break;
+                fi
+            done
+            [[ -n $skip ]] || { echo "$i key not found"; found=$(($found + 1)); }
+        done
+        if [ $found -ne 0 ]; then
+          echo "Found $found missing langkeys"
+          exit 1
+        fi
+    - name: Run Linter
+      run: npm run lint
+    - name: Run tests
+      run: npm run test:ci
+    - name: Production builds
+      run: npm run build:prod
+    - name: JavaScript code compatibility
+      run: result=$(npx check-es-compat www/*.js 2> /dev/null | grep -v -E "Array\.prototype\.includes|Promise\.prototype\.finally|String\.prototype\.(matchAll|trimRight)|globalThis" | grep -Po "(?<=error).*?(?=\s+ecmascript)" | wc -l); test $result -eq 0
diff --git a/scripts/create_langindex.sh b/scripts/create_langindex.sh
index 432419b3c..c17d77c20 100755
--- a/scripts/create_langindex.sh
+++ b/scripts/create_langindex.sh
@@ -1,5 +1,12 @@
 #!/bin/bash
+#
+# Script to create langindex from available language packs.
+# ./create_langindex.sh [findbetter]
+# If findbetter is set it will try to find a better solution for every key.
+#
+
 source "functions.sh"
+source "lang_functions.sh"
 
 #Saves or updates a key on langindex_old.json
 function save_key {
@@ -48,7 +55,8 @@ function exists_in_mobile {
 }
 
 function do_match {
-    match=$1
+    match=${1/\{\{/\{}
+    match=${match/\}\}/\}}
     filematch=""
 
     coincidence=`grep "$match" $LANGPACKSFOLDER/en/*.php | wc -l`
@@ -56,7 +64,7 @@ function do_match {
         filematch=`grep "$match" $LANGPACKSFOLDER/en/*.php | cut -d'/' -f5 | cut -d'.' -f1`
         exists_in_file $filematch $plainid
     elif [ $coincidence -gt 0 ] && [ "$#" -gt 1 ]; then
-        print_message $2
+        print_message "$2"
         tput setaf 6
         grep "$match" $LANGPACKSFOLDER/en/*.php
     fi
@@ -67,18 +75,21 @@ function find_matches {
     do_match "string\[\'$plainid\'\] = \'$value\'" "Found EXACT match for $key in the following paths"
     if [ $coincidence -gt 0 ]; then
         case=1
+        save_key $key "TBD"
         return
     fi
 
     do_match " = \'$value\'" "Found some string VALUES for $key in the following paths"
     if [ $coincidence -gt 0 ]; then
         case=2
+        save_key $key "TBD"
         return
     fi
 
     do_match "string\[\'$plainid\'\]" "Found some string KEYS for $key in the following paths, value $value"
     if [ $coincidence -gt 0 ]; then
         case=3
+        save_key $key "TBD"
         return
     fi
 
@@ -297,17 +308,13 @@ function array_contains {
     done
 }
 
+
 print_title 'Generating language from code...'
 gulp lang
 
 print_title 'Getting languages'
-git clone https://git.in.moodle.com/moodle/moodle-langpacks.git $LANGPACKSFOLDER
-pushd $LANGPACKSFOLDER
-BRANCHES=($(git branch -r --format="%(refname:lstrip=3)" --sort="refname" | grep MOODLE_))
-BRANCH=${BRANCHES[${#BRANCHES[@]}-1]}
-git checkout $BRANCH
-git pull
-popd
+
+get_language en
 
 print_title 'Processing file'
 #Create langindex.json if not exists.
diff --git a/scripts/functions.sh b/scripts/functions.sh
index f90399189..45d2ab331 100644
--- a/scripts/functions.sh
+++ b/scripts/functions.sh
@@ -1,7 +1,5 @@
 #!/bin/bash
 
-LANGPACKSFOLDER='../../moodle-langpacks'
-
 function check_success_exit {
     if [ $? -ne 0 ]; then
         print_error "$1"
diff --git a/scripts/lang_functions.sh b/scripts/lang_functions.sh
new file mode 100755
index 000000000..d8bcf38ae
--- /dev/null
+++ b/scripts/lang_functions.sh
@@ -0,0 +1,132 @@
+#!/bin/bash
+#
+# Functions to fetch languages.
+#
+
+LANGPACKSFOLDER='../../moodle-langpacks'
+BUCKET='moodle-lang-prod'
+MOODLEORG_URL='https://download.moodle.org/download.php/direct/langpack'
+DEFAULT_LASTVERSION='4.0'
+
+# Checks if AWS is available and configured.
+function check_aws {
+    aws --version &> /dev/null
+    AWS_SERVICE=1
+    if [ $? -ne 0 ]; then
+        AWS_SERVICE=0
+        echo 'AWS not installed. Check https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-install.html for more info.'
+        return
+    fi
+
+    # In order to login to AWS, use credentials file or AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY vars.
+    if [ ! -f ~/.aws/credentials ] && [ [ -z $AWS_ACCESS_KEY_ID ] || [ -z $AWS_SECRET_ACCESS_KEY ] ]; then
+        AWS_SERVICE=0
+        lastversion=$DEFAULT_LASTVERSION
+        echo 'AWS Cannot authenticate. Use aws configure or set the proper env vars.'
+        return
+    fi
+}
+
+# Get last version of Moodle to fetch latest languages.
+function get_last_version {
+    if [ ! -z "${lastversion}" ]; then
+        return
+    fi
+
+    check_aws
+    if [ $AWS_SERVICE -eq 0 ]; then
+        lastversion=$DEFAULT_LASTVERSION
+        echo "Using default version $lastversion"
+        return
+    fi
+
+    list=`aws s3 ls s3://$BUCKET/`
+    if [ $? -ne 0 ]; then
+        AWS_SERVICE=0
+        lastversion=$DEFAULT_LASTVERSION
+        echo "AWS Cannot authenticate. Using default version $lastversion"
+        return
+    fi
+
+    lastversion=''
+    for folder in $list; do
+        if [ $folder != 'PRE' ]; then
+            lastversion=${folder/\//}
+        fi
+    done
+
+    if [ ! -z "${lastversion}" ]; then
+        echo "Last version $lastversion detected"
+        return
+    fi
+
+    lastversion=$DEFAULT_LASTVERSION
+}
+
+# Get all language list from AWS.
+function get_all_languages_aws {
+    langsfiles=`aws s3 ls s3://$BUCKET/$lastversion/`
+    langs=""
+    for file in $langsfiles; do
+        if [[ "$file" == *.zip ]]; then
+            file=${file/\.zip/}
+            langs+="$file "
+        fi
+    done
+}
+
+# Get language list from the installed ones (will not discover new translations).
+function get_installed_languages {
+    langs=`jq -r '.languages | keys[]' ../moodle.config.json`
+}
+
+# Entry function to get a language file.
+function get_language {
+    lang=$1
+    lang=${lang/-/_}
+
+    get_last_version
+
+    echo "Getting $lang language"
+
+    pushd $LANGPACKSFOLDER > /dev/null
+
+    curl -s $MOODLEORG_URL/$lastversion/$lang.zip --output $lang.zip > /dev/null
+    rm -R $lang
+    unzip -o -u $lang.zip > /dev/null
+
+    # This is the AWS version to get the language but right now it's slower.
+    # aws s3 cp s3://$BUCKET/$lastversion/$lang.zip . > /dev/null
+
+    rm $lang.zip
+    popd > /dev/null
+}
+
+# Entry function to get all language files.
+function get_languages {
+    get_last_version
+
+    if [ -d $LANGPACKSFOLDER ]; then
+        lastupdate=`date -r $LANGPACKSFOLDER +%s`
+        currenttime=`date +%s`
+        ellapsedtime=$((currenttime - lastupdate))
+        if [ $ellapsedtime -lt 3600 ]; then
+            echo 'Recently updated, skip update languages'
+            return
+        fi
+    else
+        mkdir $LANGPACKSFOLDER
+    fi
+
+
+    if [ $AWS_SERVICE -eq 1 ]; then
+        get_all_languages_aws
+    else
+        echo "Fallback language list will only get current installation languages"
+        get_installed_languages
+    fi
+
+    for lang in $langs; do
+        get_language "$lang"
+    done
+}
diff --git a/scripts/update_lang.sh b/scripts/update_lang.sh
index dac901789..b47df3a7d 100755
--- a/scripts/update_lang.sh
+++ b/scripts/update_lang.sh
@@ -1,23 +1,23 @@
 #!/bin/bash
+#
+# Script to update language packs on assets and detect new translated languages.
+# ./update_lang.sh [language]
+# If language is set it will only update the selected language.
+#
 source "functions.sh"
-forceLang=$1
+source "lang_functions.sh"
 
-print_title 'Getting languages'
-git clone --depth 1 --no-single-branch https://git.in.moodle.com/moodle/moodle-langpacks.git $LANGPACKSFOLDER
-pushd $LANGPACKSFOLDER
-BRANCHES=($(git branch -r --format="%(refname:lstrip=3)" --sort="refname" | grep MOODLE_))
-BRANCH=${BRANCHES[${#BRANCHES[@]}-1]}
-git checkout $BRANCH
-git pull
-popd
+forceLang=$1
 
 print_title 'Getting local mobile langs'
 git clone --depth 1 https://github.com/moodlehq/moodle-local_moodlemobileapp.git ../../moodle-local_moodlemobileapp
 
 if [ -z $forceLang ]; then
+    get_languages
     php -f moodle_to_json.php
 else
+    get_language "$forceLang"
     php -f moodle_to_json.php "$forceLang"
 fi
 
-print_ok 'All done!'
\ No newline at end of file
+print_ok 'All done!'