The word "Margarta" doesn't seem to exist in any language. Perhaps what was meant was "Margarita", the well-known cocktail made with tequila, lime juice, and a type of orange liqueur called Cointreau. The IPA phonetic transcription for "Margarita" is /ˌmɑːɡəˈriːtə/, with the stress on the second syllable. It's important to remember that spelling can affect the pronunciation of a word, and in this case, the correct spelling leads to the correct pronunciation.