"跳（得）像蚱蜢一样"可以翻译为 "jump like a grasshopper" 或 "hop around like a grasshopper"（若强调类似蚱蜢那种特有的蹦跳方式，用“hop”更贴切） 。“蚱蜢似地跳”整体表达可译为 “jump/hop around in a grasshopper-like manner” 。
例句：
The children were jumping around like grasshoppers in the yard.（孩子们在院子里像蚱蜢一样跳来跳去 。）
He hopped around in a grasshopper-like manner, full of energy.（他像蚱蜢一样蹦蹦跳跳，充满活力 。）