What language do you wish was your native tongue?
Most of these are taken from the 50 Most Widely Spoken Languages lists I've come across. In the list, from Mandarin Chinese to Sindhi there are at least 19.7 million speakers of each language. Lower than Sindhi, these languages do not appear on the list, and I have added them myself in a mostly alphabetical order. As there are over 10,000 languages and dialects, there are obviously plenty missing! Which would you choose?