Canadian immigration will only accept documents that have been translated by a certified translator. Otherwise, how would they know that a self-translated document is truthful?
From Applying for Visitor Visa:
Any document that is not in English or French must be accompanied by
- the English or French translation, and
- an affidavit from the person who completed the translation; and
- a certified copy of the original document.
Translations may be done by a person who is fluent in both languages (English or French and the unofficial language). If the translation is not provided by a member in good standing of a provincial or territorial organization of translators and interpreters in Canada, the translation must be accompanied by an affidavit swearing to the accuracy of the translation and the language proficiency of the translator.
Important information: Translations must not be done by the applicants themselves nor by members of the applicant’s family. Family member is defined as being a: parent, guardian, sibling, spouse, common-law partner, grandparent, child, aunt, uncle, niece, nephew and first cousin.