If you are trying to learn Thai on the internet, you should try signing up to our learning Thai section which is currently being plugged for more development.  The other alternative is to use Thai Translation services because you may not have the time to perfect a letter to your Thai partner. That company offers other Pattaya Services such as:

• Shopping and delivery in Pattaya – ideal for surprise  presents
• Wedding Invitations, design, printing and delivery
• Paying Rent and Doctors Bills
• Product sourcing and reviews.
• Mystery Shopper in Thailand

Learning Thai is a long and slow process, one of the best resources I have found is the online Thai Dictionary.