Everybody who runs multilanguage site on Oxwall faces following problems:
1) Plugins without translation shows garbage on local language.
2) Custom pages and profile questions show blank untill you translate it.
Attached fix adds English translation where local translation is not found and vice versa.
How to use:
1) Copy file to ow_system_plugins\base\bol\language_service.php.
2) Remove cache files from \ow_pluginfiles\base\lang_*.php and reinstall any plugin to reinit language cache.