Yes, the script supports all LTR (left to right) based languages. You can easily add a new language from the admin area and manage the translations of various messages too from admin area. By default the script has only a limited number of languages pre-added, but you have the option to add any number of languages you want to support from the service.
One additional feature is that Inout RealEstate allows your users to choose their preferred language as well. It helps you to easily run the service targeting a region who speaks multiple languages. For example, if you are running the service in Switzerland, where people speaks German, French, Romansh or Italian, you can add and manage all these languages from your admin area and allow your users to choose their preferred language (or to change to their preferred language) when they access your website.
The script also provides limited support for R2L languages (Right to Left written languages like Arabic) also. For example, if you want to support R2L languages (like Arabic), that too is possible, though the layout of the site generally remains from Left to Right. In such cases, if you want to change the layout too to make it look from right to left (in addition to the text), that can be done with simple changes in the template files (which, if you want, we can do for you as a customization)