Can the "speak with master" familiar ability be used with a command word trigger?

[Lord Pendragon]

It's not hard to imagine creating a command-word ring that allows, say, the user to cast Fireball three times a day, using the item-creation guidelines in the DMG. Yes, as dcollins notes, such an item would be a House Rule, but not a House Rule that strays far from the Core. Indeed, I believe a Ring of Spell Storing is a Core item, and command-word, though I'd have to check to be certain.

Regarding the language of such an item, I'd always imagined the master-familiar communication as something akin to what we see in the movie Beastmaster. Usually, the animal speaks in its language, and Darr spoke in standard english, but due to their bond, each was able to understand the other. So there is no real way for the a wizard to create a command-word item "in the familiar's language" or for a non-raven familiar to use a standard command-word item.

With a raven, I'd allow it. I tend to treat familiars similar to AuraSeer's suggestion, in that they are treated in a manner suitable to the threat they present. A hawk flying high overhead is not worth attacking, when there are fighters trying to hack you to pieces. But a raven circling the battlefield dropping fireballs? Priority One.

 

[Scion]

SRD:
Command Thought: If no activation method is suggested either in the psionic item description or by the nature of the item, assume that a command thought is needed to activate it. Command thought activation means that a character mentally projects a thought, and the item activates. No other special knowledge is needed. Activating a command thought psionic item is a standard action that does not provoke attacks of opportunity.
Sometimes the command thought to activate an item is mentally imprinted within it and is whispered into the mind of a creature who picks it up. Other items are silent, but a Knowledge (psionics) or Knowledge (history) check might be useful in helping to identify command thoughts. A successful DC 30 check is needed to come up with the command thought in this case. The power psionic identify reveals command thoughts.
Powers stored in command thought items are usually not augmented, because the manifester level of such an item is assumed to be the minimum possible to manifest the stored power.

 

[AuraSeer]

Wands are spell completion, not command word activated, but maybe they are the same thing, who knows?

Who knows? Only everyone who has read the rules!

You can activate any command word item you happen to pick up, but you can only activate a wand if you have the spell on your class list. They work differently, full stop.

(Also, wands are spell trigger items, not spell completion.)