Do you often sit in front of your email inbox with English emails and see your feierabend go farer and farer away, because it takes so long to read and answer in English? [alternative: because it takes much longer to read and answer the English mails than the German ones?]
If only you knew how to put a sentence together faster.
You sell high quality products and you don’t want to make mistakes in English that perhaps make your customers think also your products are of low quality.
If only you could write more correctly in less time.