Ardern recognised New Zealand's Sign Language Week in May when she released a video of herself signing, and she also uses an interpreter for her weekly news conference.
Ardern has been praised for her response to the violent attacks last week that left 50 Muslims dead. She didn't hesitate to call the attack terrorism, wore a headscarf when meeting with the Muslim community, and promised that the Government would cover funeral costs for the victims. Then she announced plans to ban the sales of certain weapons.
But observers also noticed that Wendt appeared by her side, seen as a way of including the deaf and hard of hearing community in her response that New Zealand was truly "united in grief".
One Twitter user wrote that while watching a sign language interpreter during New Zealand's response to the Christchurch attack, "one has to acknowledge this deep sensitivity of the NZ society".
"So impressed by NZ's inclusivity of having a sign language interpreter at news conferences," one user wrote.
Others were impressed by his speed in interpretation. "How fast does his brain go?" another wrote.
On Wendt's Twitter profile, he describes himself as a second-generation Samoan New Zealander and the child of immigrants. In May, he told news outlet TVNZ1 that when interpreting in sign language, "you don't want to mimic the person or ape them in any way but you do want to as much as possible transmit how they're talking and sort of some of the implications behind what they're saying".
"As an interpreter you need to be able to be flexible enough to move with wherever the conversation's going," he said.
This week, that meant grief, and gun control.
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This article was first published in The Washington Post.