Gwoyeu Romatzyh

Gwoyeu Romatzyh ({{zh-stp|s=国语罗马字|t=國語羅馬字|p=Guóyǔ Luómǎzì}}), abbreviated GR, is a romanization (formerly used officially in the Republic of China) with complex spelling rules which allow for tonal distinctions (unlike most other Romanizations, which require additional diacritics or numerals).

Rhotacization

Because r is already used for the consonant and as a tone two marker, el is used instead to signify the Pinyin er.

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Erhua (兒化), or rhotacization, is transcribed as is said (surface form), while most other Romanizations express the underlying form. Sometimes, one GR rhotacized form equals several Pinyin forms, for example,

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• Jiel corresponds to the Pinyin jīr and jīnr.
• Jial corresponds to the Pinyin jīer and jīanr.

The final i, y, and n are deleted when rhotacized. For i, y, and iu, the rhotic el is added, for others, just l.

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