French is comfortable either way round. Je n'y suis pas allé parce qu'il pleuvait, or comme il pleuvait je n'y suis pas allé: both are ordinary and the choice is stylistic.
Thai has a strong default, and it is one direction only. Cause first, result second, hinged with เลย or ก็เลย. This is เลย's third job from week 12, and it turns out to be the commonest of the three.
- ฝนตกเลยไม่ไปfǒn tòk lɤːj mâj paj
it rained so I didn't go
- รถติดเลยสายrót tìt lɤːj sǎːj
the traffic was bad so I was late
What เพราะ is actually for
เพราะ exists, works, and puts the reason second. In speech it is used far more to answer a ทำไม question than to build a sentence out of nothing.
So: if someone asks why, open with เพราะ. If you are narrating, put the cause first and hinge it with เลย. Using เพราะ for narration is grammatical and it is the clearest single marker of a translated sentence.
- ทำไมไม่ไปtʰam.maj mâj paj
why didn't you go?
- เพราะฝนตกpʰrɔ́ fǒn tòk
because it rained
as an answer, this is exactly right
The written versions
จึง and ดังนั้น are the formal equivalents of the same order, and they keep it: the cause still comes first. Note where จึง sits, which is not where donc sits. It goes immediately before the verb of the result clause, not at the head of it.
This also lines up with the topic-comment instinct from week 4. Set up the ground, then say what follows from it. Thai keeps doing the same thing at every scale.
- จึงไม่ไปtɕɯŋ mâj paj
and therefore did not go