Old Norse Blátǫnn

→ English Bluetooth (calque)

→ Danish Blåtand (inherited)

→ Spanish bluetooth (derived)

→ Finnish bluetooth (derived)

→ Italian bluetooth (derived)

→ Japanese ブルートゥース (derived)

→ Portuguese Bluetooth (derived)

→ Russian блютус (derived)

→ Swedish Blåtand (inherited)