You can download your loan contracts from the Transactions Tab, selecting Loans in the drop-down list. Contracts can be found right under the loan, as featured in the image below: 

When you lend to a Spanish project, you sign an annex to the master loan contract signed between October and the borrower at the notary's office. This annex is as valid as the master contract. Therefore, you will be offered to download both contracts (see image below): 

Your loan contract will be either in French, Spanish, Italian or Dutch depending of where the company has its headquarters. Indeed, the loan contract in the language of the company's country of origin is the only one to have a legal value. Nevertheless, you will be offered an informative version in English before signing it.