Real Morse alphabets developed for Japanese, Russian, Greek, Arabic, Hebrew, Korean, Thai, Chinese, and the original American railroad system.
International Morse code only covers Latin letters and digits. Languages with non-Latin scripts developed their own Morse adaptations. Wabun for Japanese katakana, a Cyrillic table for Russian, separate alphabets for Greek, Arabic, Hebrew, Thai, and Korean. The original 'American' Morse used by US railroads in the 1850s also looks notably different from the international standard adopted in 1865.