During my performance review at the end of 2015, I was told I would get a (small after tax but not negligible) monthly bonus for the next year based on my performance. The review process continued and I have to admit I made some mistakes, as this was my first review: I indirectly made a few complaints and failed to praise enough my immediate supervisors for their help, which was very valuable. Besides some occasional "dirty looks" about it, nothing else happened. However, I have recently noticed that no bonus is included in my salary. An additional factor is that I work in a foreign language and may have missed some information about it (e.g. maybe it is included at the end of the year?).
I am sort of hesitant to ask about it, given my awkward stance during the review, even though I recognise the bonus may be totally irrelevant from the review. Any recommendations? Should I just be direct about the bonus only and see how it goes? I have already apologized for the complaint (which may have also been a second mistake/unnecessary. I may have caused a small mess apparently). The country is Germany.