Hi,

I wrote this text for a mail we'll send today to all SES-participants. As you probably can see, I need to improve my english! Can you help me correct this text?

Thanks in advance!
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Dear participants

only seven days before SES! In order to evaluate your current level in esperanto, we invite you to take five minutes to fill an online form. Thanks to your answers, we'll be able to propose the group which fits better to your level. This evaluation is not intended for complete beginners.

This online form is translated in 10 languages. Please choose one of them in the list below.

Your English text is clear enough. However it comes across as a little formal.

Just a suggestion :

Only seven days to go to SES. So that we can judge which group is most appropriate for you, please do our test (unless you are a complete beginner). It will only take 5 minutes. Choose your language from the list below.

PS can you provide a link for the test?
If it isn't a test then say 'please fill in our form'.