Kàndào lǎojiā biàn le yàng, tā yǒu zhǒng nányǐ yánshuō de gǎnjué.
Seeing his hometown changed, he had a feeling hard to put into words.
Tips
register
难以 ('hard to') + 言说 ('speak / express'). Literary register - common in essays and lyrics. Compare 难以形容 ('hard to describe', more visual / surface); 难以言说 is more about the inner experience that resists language.
