Select Language and translation

**Is your feature request related to a problem? Please describe.**
On the Lemmy Instance website you can choose the language off your post. In the iOS app from Voyager (1.17.1) you can’t choose / select your language. Maybe it is a problem for future translations.

**Describe the solution you'd like**
In the settings off voyager I want to select my languages which I speak. When submit a post or a replay, I want to choose a language from the selection off the settings. Furthermore, I would like to store a main language, which is selected in advance.

If a language from another post is deposited, Voyager can translate the post into my main language by pressing a button.

**Describe alternatives you've considered**
Using DeepL or iOS translation

**Additional context**
like in the actual version from Memmy