Raised by her governess, Baroness Louise Lehzen, from Hanover, Victoria was taught only German until she was three years old. She was subsequently taught French and English as well, and became virtually trilingual. Her mother spoke German with her. Her command of English, although good, was not perfect. Victoria maintained a close relationship with Baroness Lehzen for much of her life.
She did it, to have control over Europe, wasn't just Germans, there was a Russians marraiges and Danish Marraige too. I'm sure there were others.
Victoria, who was of almost entirely German descent, was the daughter of Prince Edward Augustus Duke of Kent and Princess Victoria of Saxe-Coburg-Saalfeld, and granddaughter of George III and the niece of her predecessor William IV. She arranged marriages for her nine children and forty-two grandchildren across the continent, tying Europe together; this earned her the nickname "the grandmother of Europe". She was the last British monarch of the House of Hanover; her son King Edward VII belonged to the House of Saxe-Coburg and Gotha.
She married her first cousin, Prince Albert of Saxe-Coburg and Gotha, in 1840.
During the early years of their courtship, Victoria and Albert would write together in English and in German, although she would often revert to English stating that she could not express herself properly, and his skills readily improved in order for him to assume his role in helping the queen to rule the British Empire.
However, behind closed doors they happily conversed in German together sometimes, and later on in German with some of their children. The connection with Germany continued throughout Victoria's reign, and she arranged mostly German marriages for her children and for many of her grandchildren after them.