Dear UKCitizen,

Please understand that the residence and citizenship are two different things.http://www.high-net-worth-immigration.com/residency-and-citizenship.html

Even though your spouse has a PR from EU member state, she is still a citizen of a non-EU member country, therefore she needs a visa for entering the UK and any other EU countries, different than the country issued the PR card.

The German PR card is for long stay in Germany only!

It is possible though, she to be able to travel within the Schengen area only with her German PR card; the Schengen countries are: Austria, Belgium, Denmark, France, Finland, Germany, Greece, Italy, Luxembourg, Netherlands, Portugal, Spain, Sweden, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia and Slovenia; and 3 non-EU members are Norway, Iceland and Switzerland.

Certainly, the EU PR card can help her obtaining visa for the UK or the other EU countries.

Different countries have different visa policy; it is very important the country your spouse is originating from what visa agreements has with the rest of the world.

I hope this info was useful for you.

Best