“I Love You” in Vulcan is Wani ra yana ro aisha.
Golic Vulcan is one of the created languages of the Vulcan race from the science fiction series Star Trek. It was cautiously crafted over many years by Mark R. Gardner and other collaborators in the Vulcan Language Institute, which has been obsolete since the latter half of 2008.
The core features of the language including syntax, the phonology and the basis for the morphology are creative extrapolations from the Vulcan language dialog heard in the feature films.
Notable features of the language:
Lexicon of 12,000+ terms
Pro-drop and contextually omitted copula
Pervasive compounding in nouns
Standard and short or flat vowel contrasts are traditionally common however not sharply distinguished in all cases in modern speech. Long vowels also exist (cf: maat), however are far less common.
Enclitic adverbial prefixes and prepositions
Unusual onset consonant clusters (cf: psth-, fn-, tv-)
Check out the Vulcan Language Dictionary at Starbase-10.de.
Find out how to express your love and affection in many different languages with recordings for some of them at Omniglot.com.