Steps to replicate the issue (include links if applicable):

• Navigate to eg. plwiki
• Ensure that you have a gender selected in preferences (either male or female)
• Go to Special:Impact (important - you have to view your own impact, not someone other): Special:Impact on plwiki
• Look at the text just above the graph.

What happens?:
The text Wyświetlenia artykułów, które edytowałeś(-aś) is of gender-neutral form, even though you set gender in preferences.

What should have happened instead?:
Given that you have selected explicit gender, the text should end with either edytowałeś (for men) or edytowałaś (for women). The current result should be only displayed for those who did not provide their gender in settings.

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia): plwiki

Other information (browser name/version, screenshots, etc.):
The message on TranslateWiki has all three gender forms included: https://translatewiki.net/wiki/MediaWiki:Growthexperiments-homepage-impact-edited-articles-trend-chart-count-label/pl