Hl sets the optional parameter "hl": The hl parameter indicates that the snippet.localized property values in the returned channelSection resources should be in the specified language if localized values for that language are available. For example, if the API request specifies hl=de, the snippet.localized properties in the API response will contain German titles if German titles are available. Channel owners can provide localized channel section titles using either the channelSections.insert or channelSections.update method.

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