Sincerity, not Perfection
In conveying your needs and setting boundaries, you do not have to communicate in an exquisitely perfect way that causes zero discomfort to the person you are communicating with.
Stay connected to care and compassion, be humble and open to learning about personal and cultural triggers and adjusting accordingly.
And with sincerity and humility on board, still it is not possible to be in the world in a way that causes or triggers zero discomfort for other humans. Breathe, communicate, be less than perfect.