Native Language

fixed - done with pot2po

$ cat merge_old_new.sh  
#!/bin/bash

project_from=$1
project=$2
lang=$3

potdir=/var/www/sites/translations.documentfoundation.org/translations/$project/templates/
oldpos=/var/www/sites/translations.documentfoundation.org/translations/$project_from/$lang/
newpos=/var/www/sites/translations.documentfoundation.org/translations/$project/$lang/

if [[ -z "$project" || -z "$lang" ]]; then
    echo "oh, that would be disastrous, refusing" 
    exit 1
fi

rm -rf $newpos
mkdir -p $newpos
# sync_stores (database content to filesystem for old/source project)
time python src/manage.py sync_stores --force --overwrite  --project=$project_from --language=$lang
# update templates, using the files from oldproject as basis
time pot2po --progress bar -t $oldpos -o $newpos -i $potdir
# update_stores (load files from disk into database)
time python src/manage.py update_stores --force --project=$project --language=$lang || touch $newpos/failed

/me is only regular user in this project, so please close as resolved if everything looks OK, thanks :-)