Mandarin
Persian is a common language, as a lingua franca in South Asia, Central Asia and Middle east
The most commonly spoken language in the UK is English.
Spanish is the second most common "spoken" language. The second most common language is sign language.
Based on population, Chinese Mandarin is the most commonly spoken language in the world. Spanish is 2nd, followed by English and Bengali.
Welsh is the most commonly spoken Celtic language, about 90% of the speakers live in Wales and England. Irish is the second commonly spoken.
Russian is the most commonly spoken Language in Europe.
Portugeze is the most commonly spoken language in Brazil.
Mandarin Chinese is the most common language spoken in Asia, with over a billion native speakers.
Arabic.
The three most widely spoken languages in Asia are:MandarinHindiArabic
the
English