The phrase, 'you're welcome' would need changing to 'you are welcome' to get a clear translation into another language. In French it translates as, 'vous étes bienvenus'. In Italian it would be, 'sei benvenuto'. In German it would be, 'Sie sind herzlich eingeladen'. Finally in Spanish it would become, 'Seré bienvenido'.
A warm welcome in different languages
In French the phrase is often more than just a simple, 'you are welcome', it goes further to mean, 'warmly welcome' or 'very welcome'. The Italian word, 'benvenuto', could also mean 'received with pleasure'. The German phrase could also mean, 'you are warmly invited', 'we encourage you' or 'we invite you to'. These all depend on the context the phrase is used in.
If the phrase is used by itself then it would have the simple meaning of, 'you are welcome'.
In the German it is a strong welcome so it would be, 'very welcome'. The Spanish would sometimes translate as, 'eres bienvenido'. Although, this would more commonly mean just, 'welcome', it is likely that it would be used more frequently.
The origin behind the French, German, Italian & Spanish ways of saying "you're welcome"
In the French, Italian and Spanish the word for, 'welcome', is very similar. In French it is, 'bienvenu', in Italian, 'benvenuto', and Spanish, 'bienvenido'. The correlation can be seen clearly between these words. It is thought that the origin comes from the Germanic, willkommen, which means, 'welcome'. Often it would be assumed that the word comes from Latin as a lot of languages find their origins from this language.