Depending on the language, the inflections might make you more prone to using a higher tone—I've noticed that Slavic languages, and especially Chinese, Japanese, etc. languages (all under the Sino-Tibetan branch, I discovered) naturally require more fluctuation, at least from what I've heard. Especially in Chinese, where tone influences the meaning of certain sounds/phonetics. Studying Spanish, I haven't found as much necessity for a huge range of voice. What is your second language, out of curiosity?