Traditional Chinese (actually the written form of traditional Chinese characters) is mostly used in Taiwan, Hong Kong SAR, Macau SAR, and among some overseas Chinese populations. Simplified Chinese (meaning simplified Chinese characters) is, on the other hand, mostly used in mainland China, Singapore and Malaysia. Nonetheless, the two variants are mutually understandable to the majority of Chinese.
People may become confused when comparing Traditional Chinese (written form) to spoken dialects (for example, Mandarin, Cantonese, Min Nan, Hakka, and Wu). Those who use Traditional Chinese characters may speak any of the above-mentioned Chinese dialects, likewise, those who use Simplified Chinese characters can also speak any of the above-mentioned Chinese dialects. The written version of the Chinese language (whether in traditional/complex characters or simplified characters) shares many similiarities, although spoken dialects vary greatly depending on where you reside.
We have native Mandarin, Cantonese speaking lawyer-linguists/legal translators to assist with your Traditional Chinese language needs.