PHP Spell Check feature for plain text area field on seven frontends

We are looking for a developer who can integrate PHP Spell Check script ([login to view URL]) in our audio-transcription platform. Aditionally the developer shall adapt the "button type" feature to be executed mandatorily the spell check when the user press the submit button related to the text area field where are the transcription. This is not for an app, it should be embed on our website in seven different frontends. You can see one of the frontends after registering in: www.quierotranscribir.com. After register go to "Nivelación" (Step 3) and then press on the big green button "QUIERO COMENZAR MI TEST". This project must work on Chrome, Firefox and Internet Explorer. If you are capable of doing the request above please let us know. We have seen similar requests on other projects as well so assumed this is an easy one to be resolved. If you speak spanish is better for all.