Heinrich Himmler, one of the most powerful figures in Nazi Germany and a key architect of the Holocaust, was primarily a German speaker. There is little evidence to suggest that he was proficient in English.
While Himmler was known to interact with foreign dignitaries and was involved in discussions that may have required some level of English comprehension, his primary language of communication remained German. He did not need to speak English for his role within the Nazi regime, as the focus was predominantly on German and its occupied territories.
Moreover, many of the high-ranking officials within the Nazi government were not multilingual. Instead, they often relied on translators for any necessary communication in foreign languages. This further indicates that Himmler, like many of his contemporaries, likely had limited use for English in his professional life.