There is currently no online translator in existence that will translate English to Hebrew with vowels. You would have to contact a human translator.
You can translate single words using Morfix (listed under related links), but there is no online translator that will do full text with vowels.
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The English letter V and the Hebrew letter Vav, have the exact same pronunciation.
They are dots and dashes above, below, and inside of the letters:
without vowels׃
שלו×
with vowels:
ש×ָלוֹ×
Google Translate will translate most single English words into Hebrew with vowels.