My husband is a kind and decent guy and treats me very well
In what ways is he kind and decent? How does he treat you well? It isn't coming across on this thread. Your tone on the thread makes it sound like he thinks you are a wet blanket, and that you are concerned that if you don't go, it will harm your marriage because he will resent you. That isn't kind or decent on his part. Its the opposite of treating you well.
Also, how involved is he with the children? It's odd to me that you have an infant and toddler and speak about your parents being helpful, but you haven't once mentioned him parenting.
It is normal for children to put a strain on a marriage. It is not normal for a husband to think the solution is moving his family to the other side of the globe where he wife doesn't speak the language and doesn't have a support system. It won't help. It will make it much, much worse, and leave you with fewer options.
I can't even count the number of marriages I know that ended because the man had an affair and blamed it on his wife for being miserable to live with after a cooperate relocation. Sometimes the first move doesn't push things over the edge, it's the second or third move.
If he doesn't care how you feel and how things affect you now, he won't after an international relocation, either. If he resents you for having needs now, he still will. You just won't have anything else in your life. Only him. As it is, you don't really spend time together, and he'll be all you have.
Even the women who are the most flexible and in the best marriages have bad days after these kinds of moves, and the difficult things can come up years after the moves. For one friend (who was a super strong, very flexible, multi lingual Irish woman) it came 2 years after moving to Montreal. Her DD, who had transitioned well into a bi-lingual preschool/nursery right after their move, started reception year/kindergarten. It was a nightmare. She was put in a class for "newcomers" and all the children spoke different languages, so they communicated with each other by pushing, shoving, grabbing things. Her DD cried every day, started wetting the bed, started biting her finger nails. My friend was eventually able to get her transferred out, but it took MONTHS. She watched her DD fall apart, and had to force her to go to school every day. My friend's husband is a great guy, helped sort things out, and was supportive and kind to his wife.
From what you've said about your husband, it sounds like he would think you were being a wet blanket and blaming him. Rather than supporting you and your child through a difficult situation, he would shut down your feelings.