Don't take my translation as totally the greatest,
but it's a start. feel free to suggest other possible re-phrases.
1. Come, thou Fount of every blessing, tune my heart to sing thy grace; streams of mercy, never ceasing, call for songs of loudest praise. Teach me some melodious sonnet, sung by flaming tongues above. Praise the mount! I'm fixed upon it, mount of thy redeeming love.
Come, you Source of every Blessing, (Bring into Harmony) my heart to sing your grace; Your streams of mercy never stop, make me want to praise you without holding back. Teach me a new beautiful song, sung (or given) to me through the Holy Spirit given from Heaven. Praise you for Jesus dying for me, I am thinking about it now, The place where Your love redeemed all.