If you are translating your foreign marriage certificate and birth document you need to make sure you that it's an official translator from your home country, once translated you need to get the translation verified, then take it to the Ministry of External Affairs and authenticate it for the document to be used in Canada.
...
Once translated by a canadian translater, you need to get it noirized, and then authenticated from your embassy or consulate to your home country.
Please note, if it's a foreign document, it must be translated + verified + authenticated from your home country to be used in Canada before you use your documents in spousal application. A police check and Directorate of Civil Affairs document would be helpful too.