search localized entries for all languages that the user has enabled

• Device OS and version: 8.1 (ROM doesn't matter)
• Device model/manufacturer: OnePlus X (doesn't matter)
• F-Droid version (in the About screen): 1.3.1
• F-Droid privileged extension version (if installed):

What did you do? (clear steps if possible)

I have Chinese (Simplified, Mainland variant), English (US) set in the system language preference.

Search in f-droid, for f-droid apps/contents with multilingual support (e.g., f-droid):

• search in Chinese (e.g. 是一个)
• search in English (e.g. is an installable)

What did you expect to see?

• Result app list contains that app (e.g. f-droid)
• Result app list contains that app (e.g. f-droid)

What did you see instead?

• Result app list contains that app (e.g. f-droid)
• Result app list does not contain that app (e.g. f-droid)

Feature Request

It is good to have i18n/l10n app descriptions, but it makes search a little complicated. It may be useful if f-droid can search in any (selected) languages for apps.