1. A lawyer can legally represent you at the contract signing session
   If you hire an interpreter, you’ll have to pay their fees and listen to the whole contract read out twice without really understanding more. If you order a certified translation of the contract and bring it to the notary, you won’t have to listen twice, but you still won’t understand much. The translation also tends to be more expensive, so why not hire a lawyer right away?
2. A lawyer can give legal advice and explain contracts; a translator cannot and should not
   For example, some banks will require buyers to have a translator sign that they’ve “understood the credit agreement.” Translators who know their limits will refuse these jobs. If you hire a lawyer, at least you’ll have a chance of understanding what you’re signing before some dude in a suit hands you the pen.
3. Translators are not cheap
   For property purchase contracts, I charge the full price of translating the contract (in writing). That’s around three invoiceable days, go figure. Travel expenses may be added, if I have to attend the contract signing.

Just because the contract is in a language you speak, it doesn’t mean it’s a language you understand. So you better find a trusted and qualified consultant before signing a six-figure deal.