Secret Speech Feat 1
Source Pathfinder #147: Tomorrow Must Burn
Prerequisites trained in Deception
Choose a secret society (such as the Lacunafex or the Bellflower Network). You've learned that society's secret cant or jargon, enabling you to share hidden messages when signing or speaking with others who've also learned it. If an observer succeeds at a Perception check against your Deception DC when you do this, they realize you are passing a message but fail to discern its content, unless they subsequently succeed at a Society check against your Deception DC. On a critical success, they learn not only the message, but also who you're passing the message to.
Special You can take this feat multiple times. You learn the secret speech of a different society each time.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
GeneralA type of feat that any character can select, regardless of ancestry and class, as long as they meet the prerequisites. You can select a feat with this trait when your class grants a general feat.
SkillA general feat with the skill trait improves your skills and their actions or gives you new actions for a skill. A feat with this trait can be selected when a class grants a skill feat or general feat. Archetype feats with the skill trait can be selected in place of a skill feat if you have that archetype's dedication feat.