Rhotacism
- Albanian language
- Aquitanian language
- Aramaic
- Basque language
- East Germanic languages
- Finnish language
- Germanic languages
- Gheg Albanian
- Gothic language
- Greek alphabet
- Hebrew
- Irish language
- Manx language
- North Germanic languages
- Old Norse
- Proto-Germanic
- Proto-Semitic
- Rune
- Scottish Gaelic
- Souletin dialect
- South Levantine Arabic
- Tosk Albanian
- West Germanic languages