Your screenshot indicates that German is the selected language for your text. Language is a character attribute. Check either your paragraph styles or the character panel.
Ah, thank you. I note that I seem to have to change the language for every 'element' on the page. For example, I did what you suggested and it worked... and then I noticed that text in a table STILL presented in "German". But I am happy to change on a 'per item' way if there is no global way of applying new language to every element on the page.