It seems that language support for Alvik in mBlock is only partially implemented.
see for example here for mixed English/German:
Other bots seem to have complete translations, its mainly Alvik with missing parts.
I'd like to volunteer completing the missing translation strings, but can't find where I could contribute.
Looks like the "official" github repot at https://github.com/Makeblock-official is not the source for the recent versions.
Any hints?