The issue of sending SMS with different languages and characters is a common problem for developers building SMS apps. To address this challenge, developers need to take extra steps such as determining the character set to use, passing it to the SMS gateway, and verifying that the API or SMPP gateway supports the required encoding. However, some character sets like GSM 3.38 are harder to support due to their complexity. To overcome this hurdle, Twilio offers a recognition feature that automatically determines the encoding needed for each message, takes care of the necessary conversions, and provides full unicode support including non-BMP characters. This approach ensures that messages are sent correctly regardless of the language or character set used, resulting in a better customer experience.