I agree. WhatsApp is by far the most popular app in Brazil (of all kinds, not only messengers). Yet…
- Its name is unpronounceable for 90% of its users (we short it to ”zap”)
- The word itself has unfamiliar letter combinations (“wh” and “pp”).
- The intended pun doesn’t work at all, since no one here uses “What’s up” (not even the 10% that understands English)
Similar to what happens with “Google” and “Facebook”, btw.