Celebrity Solstice was, at 122,000 GT, the largest ship to be built at a German shipyard, but this record was surpassed by the Disney Dream, a 128,000 GT cruise ship of the Disney Cruise Line.
Languages can definitely change and they can diverge. For example, Latin split up into the modern Romance languages: Portuguese, Spanish, Romanian, Galician, etc. This is less known, but languages can also converge: those languages are called creole. Some people argue that English is also similar to a creole: a mix of Germanic and French.
Therefore, when having a diverse society, having language barriers is inevitable as society members do need to communicate and their languages would be in the way. For example, the government of Canada claims to be a bilingual country, however, there is only one bilingual province that and the rest is monolingual.