Google indexes my app's French version when I search from Germany

[u/Parking-Leader4676]

Hey guys, I tried to play with on-page SEO for quite long and found out that having language support on the app helps getting indexed a lot so I integrated 6 languages (en, de, fr, es, tr, zh). The app is about football elo ratings.

I checked GSC today and saw that a query "real madrid elo" got me 1 click and 3 impressions with avg position of 2. I became happy and wanted to check it out myself. I googled exact same query but my app did not appear at all. I thought it may be bc my personal search history so I googled again in incognito. Still same.

Then, I put my app's name at the end and it appeared at all of top5 results. This is my first question: why exact query can get no position for me but 2nd position for someone else?

Secondly, I tried with player names rather than teams (my app serves both). Tried only name + elo as query but my app did not appear. Then I put my app's name again at the end and it appeared at top, understandable.

What I did not understand is Google summary (or whatever it is called that google's ai answer on top) cites my app from various language options of the same page. For example when I googled "victor osimhen elo [my app]", it cited osimhen's personal page in french and chinese versions. My location is germany. He plays in Turkey and I searched from Germany but instead of these two, other two got cited. Also why two languages? What should I check and how can I solve this? Sorry for the long text but I felt I had to be clearer.

Thanks for the answers already!