Germany nationality proces ?

Foreigners can apply for permanent residence  after 5 years of legal residence  In some cases the waiting time is less than five years and you can apply for  citizenship after 5 years of residency (In some cases less than five years) after your permanent 12-month stay in the german.
You can apply for  citizenship by naturalization after 5 years of residence, or after 3 years of residence if you are married to a citizen  or in a civil partnership with it that needs to meet the following  citizenship requirements:
- Adequate knowledge of English
- Pass a life test in the german
- Do not have a serious criminal record
- You haven't spent more than 450 days outside the german in the past five years 
- Don't spent more than 90 days last year 
- Acquired permanent residence 12 months ago