I was wondering if there is a way to limit or restrict the choice of available languages for ownCloud users. This would be really useful, if custom mail templates are used. If you adjust the sentences in a mail template, the translations do not work anymore. This is especially annoying, if you keep some sentences and adjust some. This would lead to some sentences being translated and others not. To avoid this, you have to either edit each translation files or to just change every sentence in the mail templates. I think a more practical way would be to be able to restrict the users to only select some languages in their preferences. The Administrator then only has to adjust this languages instead of all.
Steps to reproduce
1. Change a sentence in the mail templates
2. Manage to receive the mail based on this template (f.e. Activity notification).
3. See that the adjusted sentence is not translated.
If there is an option to limit the available languages, the effort to manage these would be pretty easy.
The admin/owner of the ownCloud instance needs to adjust every language file (or include all the language files in his theme and adjust them).
Operating system: Debian Jessie 8.7
Web server: Apache/2.4.10
Database: mysql Ver 14.14 Distrib 5.5.54
PHP version: PHP 5.6.30-0+deb8u1
ownCloud version: 22.214.171.124
Updated from an older ownCloud or fresh install: Updated from 9.1.0