YOU SAID:
Sweetly singing o'er the plains And the mountains in reply Echoing their joyous strains
INTO JAPANESE
平原と山の返事で甘い歌を歌う
BACK INTO ENGLISH
Sing a sweet song in response to the plains and mountains
INTO JAPANESE
平野と山に応えて甘い歌を歌う
BACK INTO ENGLISH
Sing a sweet song in response to plains and mountains
INTO JAPANESE
平野と山に対応して甘い歌を歌う
BACK INTO ENGLISH
Sing a sweet song for the plains and mountains
INTO JAPANESE
平野と山のために甘い歌を歌う
BACK INTO ENGLISH
Sing a sweet song for the plains and mountains
That didn't even make that much sense in English.