Here comes some translations in case you are a language-impaired immortal (from the Highlander FAQ):
French - Il ne peut y en avoir qu'un Italian - Ne resterà soltanto uno Spanish - Sólo puede quedar uno Japanese - Hitori sonzai suru nomi Korean - hanmyeong man isseul su isseoyo German - Es Kann nur Einen geben Afrikaans - Daar kan slegs een wees Esperanto - Povas esti nur unu Finnish - Vain Yksi Voi Jaada Swedish - Den kan bara vara en or Det kan bara vara ett Russian - Mozhet Bwit Syevo Adin Polish - Tam Moze byc tylko jeden Czech - Muzhe prezit jenom jeden Latin - Potest esse nur unus Hebrew - Suf davar echad levad Yiddish - Tusm sof ken nor Zayn eyner aleyn Tagalog - Puede be isa nalang Klingon - rathlaHebj wa' neH
* I'm not sure of any (except Spanish), so /msg'me with corrections and additions. Thanks to Wonder Llama and his friend for the Czech correction and kudos to SwedishWhore for the um, Swedish one! Recent Korean addition thanks to Dystopian Autocrat. And our Italian Highlander is Vorbis.