What is the Portuguese j~_r phoneme supposed to represent? When I transliterate this X-Sampa symbol back to IPA, I get [j̃˔], and I don’t know how that is different from [ʝ̃], the nasalized voiced palatal fricative.
Similarly, I don’t know where the Portuguese phonemes r\ and r are used. Those are [ɹ] and [r] respectively, and Wikipedia’s page about the Portuguese phonology doesn’t say those are actual phonemes in Portuguese. What’s going on?