The message "Reinforcement of hummingbird squash is in fox light" is likely a coded message using Navajo code talker language.
Consulting the Navajo Code Talkers' Dictionary, we can see that:
Hummingbird is translated to "Dah-he-tih-hi"
Squash is translated to "Moasi"
Reinforcement is not listed in the dictionary
Fox is translated to "Ma'ii"
Light is translated to "K'ehjigo"
Without the translation for "reinforcement," we can only provide a partial interpretation of the message. However, it appears that this message may have been encoded using Navajo code talker language, with "hummingbird squash" and "fox light" possibly referring to specific locations or military operations.