Even if Chinese or Hindi are the most spoken languages per number of speakers, English is still the most important one for a variety of reasons. I did enjoy reading your post and found your method of learning daily vocabulary very interesting. I used to do something similar by writing down words in a notebook. I just had a different approach: I copied the word with its translation then each word was repeated at least 50 times like a primary school assignment. At the end you won't forget it.