Since I actually knew nothing about the /marry command I did a little research. The original is no longer in use and is now called Marriage master. I took the liberty of copying the benefits and commands ect so that those that have no knowledge of what it does and its perks can read up.
Features:
Permissions
Teleport to partner
XP Boost when near partner
faster health regeneration when near partner
Shared Home with partner
Private Chat with your partner
Marry players through a priest or yourself
Enable/Disable PvP with you partner
Ability to kiss your partner (with particle effect on 1.7 and newer)
Gift Items to your partner
View all married
Option to enable the need to accept the marriage
Optional vault support (for permissions and economy)
Chat prefix
Surnames
Minepacks integration to share backpacks
Multi Language (English and German Language File included)
MySQL Support
Support for MC 1.7.6 and newer
BungeeCord Support
Commands:
/marry - List all marry commands
/marry <playername> <playername> - Marries two players, only for priests
/marry divorce <playername> - Divorces two players, only for priests
/marry list - Shows all married players
/marry tp - Teleports to the partner
/marry sethome - Sets the home for two married players
/marry home - Teleports to the home of married players
/marry chat - Allows to chat a couple private
/marry chat toggle - Toggles the chat to send all chat messages to the partner instead of to the public
/marry pvpon - Turns PvP between two married players on
/marry pvpoff - Turns PvP between two married players off
/marry kiss - To kiss your partner
/marry gift - Gifts the item in your hand to your partner
/marry backpack - Opens the backpack of your partner
/marry backpack on - Allows your partner to use your backpack
/marry backpack off - Disallows your partner to use your backpack
/marry me - Sends a player a marry request
/marry priest <playername> - Sets a priest
/marry listenchat - Shows the marry chat
/marry reload - Reloads the configuration of the plugin
Permissions:
marry.* - Allows all permissions
marry.admin - Allow to setpriests and reload and also makes you a priest
marry.bypass - Gives all bypassing permissions
marry.user - Gives acces to all user functions
marry.chat.* - Gives acces to all chat options
marry.list - Allow to list all married players
marry.pvpon - Allow to turn pvp with partner on
marry.pvpoff - Allow to turn pvp with partner off
marry.priest - Makes someone a priest
marry.tp - Allow teleport to partner
marry.home - Allow to use the home with the partner
marry.chat - Allow to use the private chat with the partner
marry.chat.color - Allows colors in private messages
marry.chat.format - Allows formating private messages (except magic)
marry.chat.magic - Allows magic format in private messages
marry.kiss - Allows to kiss your partner
marry.gift - Allows you to gift items to your partner
marry.backpack - Allows to share the backpacks (requires Minepacks)
marry.selfmarry - Allows a player to send other players marry requests without the need of a priest
marry.changesurname - Allows to change the surname when self marry is on or if you are a priest.
marry.setpriest - Allow someone to make players to priests
marry.offlinedivorce - Allows a priest to divorce a couple if only one of them is online
marry.listenchat - Allows to see the private chat
marry.skiptpdelay - Allows to skip the tp delay
marry.bypassgiftgamemode - Allows to gift items from creative mode
marry.bypassrangelimit - Allows to bypass the range limit
marry.reload - Allows to reload the config file
after reading a bit more since the married couple would have there own chat the main issue of bringing rp to doge should no longer be an issue as they would have there own private chat. That does mean of course that the wedding itself would still have to be in /lc so that it does not bring rp into main chat.