I speak 8 languages from many separate groups (Germanic, Romance, Slavic, Sino-Tibetan, Japanese), and my impression is that languages truly put constraints on one's ability to formulate thoughts. Of course, mentalese, the unspoken one, is different, independent, but it's rare people retain it to their older age and by then prevailing cultural/linguistic currents shape their thoughts. Sapir-Whorf might be discredited as general hypothesis, but it might correspond to 95% practical state statistically-wise.