I agree, ideally of course we would have a [strike]2[/strike] 4+ eyes system. BUT, if there are not enough people to do so, I think it is better to have the translation and correct it later if necessary, rather than not having it at all, because there is no second person that can approve these translation.
So go ahead and ask for getting approval. On the other hand, I see that there are two members (jeskiv, morbid) considered to be responsible for approving (
translate.limesurvey.org/projects/limesurvey-4/
).
However, I can see that jeskiv is still here. So maybe the ideal would be one approves the other's translations, in case jeskiv considers him/herself still active...