 This was enough for him to deem that Caspar, being an anthropologist, could potentially have some linguistic errors within his field-notes and documentations (Singerman, 2018, pp 7–8).Even though the description of the Tuparí language prior to that done by Singerman was fairly limited, the cultural documentation was among the best in the region.With that being said, the Tuparí people are also currently experiencing a loss of that culture through a language shift, due to the overwhelming modern pressure for them to switch to Portuguese.