It is not possible to use online services like for instance google translate to translate text in Thai into text in English or any Nordic language.Single words are possible to translate with reasonable certainty. However, several apps can easily be downloaded on your mobile phone that will be able to help you with this. There are are also several handheld devices specifically developed to translate from Thai to English and from English to Thai, often with sound option.
You will find them inthe electronic department of any department store. For official translation of documents, there are many small and inexpensive service operators in the main tourist centres of Thailand.