Actually, the Chinese characters of western brands in Chinese are most often chosen because their sounds phonetically correspond to the brand name in English (sort of). Thus, the Chinese characters for “Coca Cola” are written in pinyin as “kekoukele”, which sound sort of like “Coca Cola”.
Not all brand names in Chinese are chosen this way. Some are direct translations of the western name. Thus, in Chinese “Apple” is known as “Pingguo”, the Chinese word for “apple”.