Hi @kariimde,
A language certificate is not a requirement to renew your reisdence permit.
You may at some point be obliged by the Ausländerbehörde or the Jobcenter (if you are receiving financial support form them) to take part in an Integration Course, if they have the view that your German is not good enough. If this happens, they will write to you to inform you of this obligation (in German 'Verpflichtung zur Telnahme an einem Integrationskurs'). If you refuse to do the integration course, it can then have an impact on getting your permit renewed.
Best,
Éanna